Investments in Unconsolidated Subsidiaries and Affiliates - Summary of Combined Results of Operations and Financial Position Reported By Investees Accounted Using Equity Method (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Net revenue	$ 22,080	$ 21,541	$ 17,802
Net income	2,383	2,039	1,760
Statement of Financial Position [Abstract]
Total assets	46,351	39,381
Total liabilities	38,117	32,405
Total equity	8,180	6,927	6,808	$ 4,989
Unconsolidated Subsidiaries and Affiliates
Income Statement [Abstract]
Net revenue	2,748	2,096	1,996
Income before taxes	888	348	332
Net income	733	280	$ 247
Statement of Financial Position [Abstract]
Total assets	7,792	7,290
Total liabilities	6,347	6,376
Total equity	$ 1,445	$ 914